John e



J.v R. REYNOLDS. Millstone-Driver.-

No. 228,838. Patented June 15, asso.

y 1,1. y J

UNITED STATES PATENT FFIC E.

JOHN R. REYNOLDS, OF JACKSON, MICHIGAN, ASSIGNOR OF ONE-HALF OF HIS RIGHT TO HENRY HAYDEN, J R., OF SAME PLACE.

MlLLSTONE-DRIVER.

SPECIFICATION forming part of Letters Patent No. 228,838, dated June 15, 1880.

Application filed January 2!). 1880.

To all whom it may concern:

Be it known that I, JOHN R. REYNOLDS, of the city and county of Jackson, in the State of Michigan, have invented new and useful 5 Improvements in Millstone-Drivers, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to the driving mechanism whereby the motion of the spindle is imparted to the rotating stone.

The object of my invention is to construct this driving mechanism in such manner that the running-stone will center itself automatically, and thereby rotate in plane at right angles with the spindle and parallel with the stationary bedstone under all circumstances.

My invention consists of a driver capable of lateral adjustment on the upper portion of the spindle, and provided with two wedge-keys,

2o bearing with their inner ends against opposite sides of the spindle and with their outer ends against the driving or face sides of the bail, whereby the pressure upon both arms of the bail is equalized; also, in combining with the driver and the wedge-keys, which bear with their outer ends against the driving sides of the bail, a movable plate having projecting horns or lugs, which bear against the rear sides of the bail, whereby backlash is prevented also, in combining with the driver and wedgekeys, constructed and arranged as hereinafter described, a movable plate having depending horns, which bear against the rear sides of the bail in line with the wedge-keys, as will be 3 5 hereinafter fully set forth.

In the accompanying drawings, Figure l is an elevation of my improved driving mechan ism. Fig. 2 is a top-plan view of the same. Fig. 3 is an elevation at right angles to Fig. 1; Fig. 4 a top-plan view with the bail removed. Fig. 5 is a horizontal section in line as m, Fig. 1. Fig. 6 is a top-plan view of the drivinghead. Fig. 7 is a perspective view of the backlash-plate. Fig. Sis an elevation of the upper part of the spindle.

Like letters of reference refer to like parts in the several figures.

A represents the spindle, constructed with a flat upper end, A, which terminates in a 5 pivot or cock-head, a, in the usual manner.

13 is the bail, supported upon the pivot a, by means of a socket or cockeye, b, as usual.

0 is the driving head, resting upon the shoulder of the spindle and provided with an elongated opening, 0, the straight sides of which fitsnugly against the sides of the flat portion A of the spindle. The opening 0 is made longer than the diameter of the spindle, so that the driving-head O can slide forward and backward upon the shoulder of the spindle in adjusting itself.

D are the driving horns or lugs of the head 0, arrangeddiametrically opposite each other, so as to overlap the driving faces or sides c of the bail.

F F are two wedge-keys, arranged on opposite sides of the spindle in keyways or recesses extending from the faces of the driving-horns D into the head 0 and past the spindle, the latter being preferably notched, as shown at 'g, to give the wedges F a firm bearing against the spindle.

H is a movable plate resting upon the head 0, and provided with an elongated opening, 1', similar to that formed in the head. 0, whereby the plate is enabled to adjust itself laterally on the spindle.

K K are two projecting horns or lugs formed on the plate H, diametrically opposite each other, so as to bear against the back of each arm of the bail.

The horn D of the driving-head and the horn K of the plate form on each side of the spindle the jaw, in which the respective arm of the bail is firmly held.

The lugs K of the plate H depend from the ,plate or extend downward, so as to bear against the back of the bail directly opposite the points at which the edges F bear against the faces of the bail, thereby insuring the vertical position 0 of the bail. I

Power being applied to the spindle, the head 0 rotates with the spindle in the direction of the arrows in Fig. 2, the butt-ends of the wedges F pressing against the driving-faces e, 5

thereby imparting the motion of the head 0 to the bail B and the running-stone, to which it is secured. If one of the parts should happen to be out of center, the pressure exerted by one arm of the bail against the adjacent wedge- :0

key will be greater than the pressure exerted by the other arm of the bail, and the wedge F receiving the greatest pressure will be driven in toward the spindle, while the opposite wedge will be driven out away from the spindle. This motion of the wedges will cause the head (J to slide laterally on the shoulder of the spindle, the head 0 carrying the bail with it, thereby changing the center of rotation of the head 0 and of the bail until a perfect equilibrium is established.

The wedges F are preferably. constructed of steel, so as to move freely in the keyways of the drivii'lg-head.

The movable plate H, bearing against the backs of both arms of the bail, moves with the bail when the latter shifts its position, and thereby insures a firm back rest for the arms of the bail in all positions of the latter and prevents all backlash, especially in starting and stopping the stone.

My improved driving mechanism enables the runningstone to rotate parallel with the face of the bed-stone, thereby equalizing the pressure upon all parts of the stones in grindin g, and improving the operation of grinding, especially by preserving the dress of the stones, preventing the heating of the meal, and producing a large amount of whiter and stronger flour of a uniform degree of fineness out of the same quantity of grain with a small expenditure of power.

I claim as my invention- 1. The combination, with the bail B and the driving-head 0, made laterally adjustable 011 ways, and bearing with their inner ends against the spindle and with their outer ends against the driving-sides of the bail, and the movable plate H, resting upon the head 0 and provided with two horns, K, which bear against the rear sides of the bail, substantially as and for the purpose set forth.

3. The combination, with the movable driving-head (J,provided with two driving-horns,D, on opposite sides of the spindle, and two sliding wedge-keys, F, arranged on rectilinear keyways in said horns, of the movable plate H, constructed with two depending horns, K, arranged on diagonally-opposite sides of the spindle and bearing against the rear sides of the bail in line with the wedges F of the drivin g-head, substantially as and for the purpose set forth.

JOHN R. REYNOLDS.

XVitnesses HENRY I'IAYDEN, J r., HENRY V. PERRIN. 

